Bead for tires.



J.' R.- GAMWETER. BEAU FOR mais.

APPLICATION FILED SEPT. 3, 9l2.

,ll,U.j-L original application filed December 19,

THBII GAMMETER, 01? AKRN, DHH), ASSIGNR TO THE B. 2F. GOLDRICH COMPANY,

i F NEW YORK, N. Y., A CUB-PORI'ION 0F NEW YORK.

BEIM) FOR TIRES. L

.To all wwm if mag/concern.'

Be it known thatjl, JOHN l?. GAMMETER, a citizen ofthe- United States,residing at Akron, in the countyl of Summit andl State of Ohio, haveinventedcertain new and useful improvements in 'Beads for Tires, ofwhich the following is a-l specication.

My present invention pertains to an improved bead for tires, theconstruct-ion and advantages of which will' be hereinafter more fullyset forth.

The invention is illustrated the accompanying drawings, wherein: I l

Figure 1 is an elevation of a portion of the tubular wire fabric and theinclosed rubber core which go to form the main Abody and strengtheningelement of the bead;'l3`ig. 2 is a similar View, the tubular fabricbeing shown as partly telescoped or swallowed.; Fig. 3 is a perspectiveview of the completed bead; and Fig. -t is a section oi' the bead, shownon a somewhat larger scale.

The main object oit' the present invention is to produce a beadstructure in which the wire strengthening' element is substantiallycontinuous, it being formed from a continuous tubular structure which istelescoped withinA itself, so as to produce a complete annulus, thevarious layers of which interlockv with each other and thus preventslipping and elongation of the structureas a whole.

A. further object of the invention is 'to provide a core-piece for themetallic member, which, when vulcanized, becomes hard, and by reason ofthe pressure exerted by the molds is forced outwardly into and throughthe meshes of the various superincumbe'nt layers of the-tubular wirefabric, interlocking such layers, and being likewise autogenously joinedto the outer layers of rubber or rubber fabric which are placed aboutthe metallic element.

Assuming, for instance, that it be desired to produce a 30-inch bead,one takes a piece of tubular wire braid 1, 24 feet long, and insertstherein, at one end, a piece of unvulcanized india rubber2,`approximately nine feet long', after which the tubular fabric istelescoped or caused to swallow itseli1 in the manner indicated in Fig.2. This action is continued until the ends or the rubber core 2 abut, atwhich time the annulus formed by the super-incumbent layers of tubularwoven Specification of Letters Patent,

Futonbett ipr. 25, illliti.

1911, Serial No. 666,648. liivided and this application Vfiled SeptemberSerial No'. 718,310.

suitable mold, the braid will lengthen slightly, reaching its limit ofelongation at the desired diameter of the bead. The various wires of thesuperincumbent layers tend to interlock somewhat, even before thebieadis vulcanized, and when subjected to pressure and .the rubber core 2 iscured and'lbecomes hard after having passed to a greater or less extentinto the meshes of the wire fabric, said fabric becomes thoroughlyinterloclted throughout, and in effect is a continuous member, withoutjoint. The construction, while being strong and firm, moreover places anequal, or substantially equal, strain upon the various wires throughout,whereby each wire is made to take its proper share of the strain. Underactual test it has been found impossible' to'cause the layers of thetubular wire fabric, vafter the parts are vulcanized,

to sli on eachother-'conse uentl L there can be no elongation of the`bead from .that cause.

producing beads such as above described, j

as the same forms the subject-matter `of my co-pendingapplication SerialNo., 666,6i8,

filed on the 19th day of December,- 1911, of v which this application isa division. p

Having thus described my .-invention, what l claim is:

l l. A bead for tires, comprisingfan annulus formed of a tubular wirefabric'telescoped upon itsel'to producea plurality of superposed layers,said annulus being embedded i-n a body of rubber. j

2. A bead' for tires,'comprsing an annulus formed ot' a tubular braidedwire fabric, having a core oit relatively hard rubber within the same,and surrounded by a body of rubber, said rubber portions beingautogenously connected. wwe fabric will have a diameter slightly lesecomprising an annulus vformed from a continuous piece of tubular braidedWire fabric telescoped upon itself so as to produce a plurality ofsuperposed layers; a core of relatively hard rubber with- 1n theannulus; and a layer of rubber sur- 'rounding the annulus, said core andlayer being autogenously connected and embedupon itself and ding theWire fabric.

'4. An annulus for tire beads,

n comprising a tubularh braided wire fabric telescoped producing aseries of superposed layers, the wires of one layer interlocking withthe Wires forming the meshes of the adjacent layer. A .i

5. An annulus for tire beads, comprising an open mesh, tubular, braided.wire fabric telescoped upon itself and producing a. series .ofsuperposed layers, the wires of one layer interlocking with the wiresforming the meshes of the adjacent layer and acting to l JOHN R.GAMMETER.

Witnesses:

YvVAI/rnn K. Menus, ILLA N. KIRN.

